Abstract: The invention comprises a striking rod, a rotating shaft, a stand and an elastic element, wherein the rotating shaft comprises a shaft body where the striking rod is disposed, two side ends on two sides of the shaft body, and a protrusion arranged on the shaft body and opposite to the striking rod. The stand comprises a base and two columns arranged on two sides of the base. The two columns are respectively provided with a socket tube pivotally connected to the side end, and a locking hole. The locking hole is located below the socket tube and is offset towards a musical instrument. Two ends of the elastic element are respectively fixed to the locking hole and an engaging element. Since the socket tube is not on the same vertical line as the locking hole, an initial position of the striking rod is offset away from the musical instrument.

Abstract: The present invention provides a calibration system and method of multi-image output system. The output image of the multi-image output system can be automatically calibrated by using simple hardware apparatus and algorithm.

Abstract: A portable temperature-stable storage device for at least one object, the portable temperature-stable storage device comprising: a primary chamber (100) configured to store the at least one object; a secondary chamber (120) comprising: a first barrier (121) configured to, in an open configuration, provide access from external surroundings of the portable temperature-stable storage device to inside the secondary chamber and, in a closed configuration, prevent access from external surroundings of the portable temperature-stable storage device to inside the secondary chamber, and a second barrier (122) configured to, in an open configuration, provide access from the secondary chamber to the primary chamber and, in a closed configuration, prevent access from the secondary chamber to the primary chamber; and wherein the second barrier is adjustable between the open configuration and the closed configuration whilst the first barrier is in the closed configuration.

Abstract: A method and an electronic device for enhancing efficiency of searching for a region of interest in a virtual environment are provided. The virtual environment includes a visible scene and an invisible scene. A picture-in-picture (PIP) is displayed in the visible scene as a directional guidance or distance hint related to the region of interest in the invisible scene, thereby saving time and enhancing efficiency of searching for the region of interest.

Abstract: An electronic device is provided. The electronic device comprises a display unit and a processing unit. The processing unit is electrically connected to the display unit and is configured to perform steps including: obtaining signal strength of connections between a plurality of nodes; and controlling the display unit to display the connections graphically according to the signal strength. An operation method adapted to an electronic device, and a non-transitory computer readable storage medium is also provided.

Abstract: The present invention aims to adjust the height of a musical instrument chair, including an upright rod seat, a pressing plate, a return spring, and an upright rod, wherein the upright rod seat comprises an up-to-down through receiving space and a side opening horizontally communicated with the receiving space; the pressing plate is disposed at the side opening and pivoted to the upright rod seat; the return spring is disposed between the pressing plate and the upright rod seat; and the musical instrument chair is disposed at an upper end of the upright rod, and the upright rod penetrates into the receiving space from up to down, and is provided with a plurality of height-different fastening slots in which the pressing plate is fastened at the normal position so as to fix the upright rod.

Abstract: A system for sensing glucose concentration is provided and includes following components. A light source generates a light beam. The system may include a polarization state generator (PSG) for changing the polarization of the light beam, and then the light beam is emitted to a biological tissue. A polarization state analyzer (PSA) receives the light beam reflected from the biological tissue, and the received light beam is used to calculate Stokes vectors. A Mueller matrix is calculated according to the Stokes vectors. In some embodiments, the system includes an optical coherence tomography (OCT) in which the light beam is sensed by a detector for calculating the Mueller matrix. An optical rotation angle and a depolarization index are calculated in accordance with the differential Mueller matrix formalism. The glucose concentration is calculated in accordance with the optical rotation angle and the depolarization index.

Abstract: The stand clamp with ease of force application comprises a fixed part, a movable part and a screwing-lock part. The movable part is pivotally coupled to the fixed part. The screwing-lock part includes a bolt, a pressing plate, a rotating rod and a resetting assembly, wherein two ends of the bolt are provided with a threaded section and a ratchet wheel section respectively. Further, the rotating rod slips with respect to the bolt to form a reset position and an actuating position. The resetting assembly is linked to the bolt and the rotating rod, such that the rotating rod is in the reset position under an ordinary state. In addition, the rotating rod can freely rotate with respect to the bolt at the actuating position. Therefore, an operator can freely change the position of the rotating rod and apply a force with a most suitable application angle.

Abstract: A chuck structure for fixing a drumstick on a non-circular revolving shaft of a foot drum includes a retractable chuck, two arched plates and a fastening element. The two arched plates clamp the non-circular revolving shaft. An inner arched surface of each arched plate has an inner fastening surface correspondingly clamping the non-circular revolving shaft, and an outer arched surface of each arched plate has a spiked surface. The retractable chuck includes a fastening portion and a rotating portion, which are pivotally connected to each other, clamp the two arched plates, and are penetrated by the drumstick. Each of the fastening portion and a rotating portion has a clamping surface abutting against the spiked surface. The fastening member propels and rotates the rotating portion, so as to allow the retractable chuck, spaced by the two arched plates, to clamp and fasten on the non-circular revolving shaft.

Abstract: A microscope-based system and a method for image-guided microscopic illumination are provided. The microscope-based system for image-guided microscopic illumination comprises a microscope, an illuminating assembly, an imaging assembly, a first processing module, and a second processing module. The microscope comprises a stage, and the stage is configured to be loaded with a sample. The imaging assembly comprises a camera. The processing modules are coupled to the microscope, the imaging assembly, and the illuminating assembly.

Abstract: The present invention provides a video switching apparatus, a video switching system, and a video switching method. The video switching apparatus includes a video generating unit and a processing unit. The video generating unit receives a first video signal forming a first video picture and a second video signal forming a second video picture, and generates a display video signal to be displayed on the head mounted device, wherein the display video signal is adjusted to form a first mode picture or a second mode picture, and the first mode picture includes at least a portion of the first video picture and at least a portion of the second video picture. The processing unit receives a first sensing signal from a sensing unit and outputs a first switching signal to the video generating unit. The video generating unit generates the display video signal corresponding to the first mode picture or the second mode picture based on the first switching signal.

Abstract: A system for sensing glucose concentration is provided and includesZZ following components. A light source generates a light beam. The system may include a polarization state generator (PSG) for changing the polarization of the light beam, and then the light beam is emitted to a biological tissue. A polarization state analyzer (PSA) receives the light beam reflected from the biological tissue, and the received light beam is used to calculate Stokes vectors. A Mueller matrix is calculated according to the Stokes vectors. In some embodiments, the system includes an optical coherence tomography (OCT) in which the light beam is sensed by a detector for calculating the Mueller matrix. An optical rotation angle and a depolarization index are calculated in accordance with the differential Mueller matrix formalism. The glucose concentration is calculated in accordance with the optical rotation angle and the depolarization index.

Abstract: A fast-dismounted cymbal-locking nut being screwed through an outer thread of a mounting bolt of a cymbal to press the cymbal tightly and adjust the position of the cymbal, comprises a seat, a first wing, a second wing, and a resilience element. The first and second wings are pivotally coupled to the seat; each of them has a locking position and a fast-dismount position. The first and second wings respectively include first and second semi-spherical threaded grooves, which jointly form an inner thread corresponding to the outer thread at their locking positions. At the fast-dismount positions, the shortest distance between the first and second semi-spherical threaded grooves is larger than the outer diameter of the outer thread. The user can directly mount the nut to the outer thread without screwing the nut through the outer thread. The nut enables the user to fast mount or dismount a cymbal.

Abstract: A fast-dismounted cymbal-locking nut being screwed through an outer thread of a mounting bolt of a cymbal to press the cymbal tightly and adjust the position of the cymbal, comprises a seat, a first wing, a second wing, and a resilience element. The first and second wings are pivotally coupled to the seat; each of them has a locking position and a fast-dismount position. The first and second wings respectively include first and second semi-spherical threaded grooves, which jointly form an inner thread corresponding to the outer thread at their locking positions. At the fast-dismount positions, the shortest distance between the first and second semi-spherical threaded grooves is larger than the outer diameter of the outer thread. The user can directly mount the nut to the outer thread without screwing the nut through the outer thread. The nut enables the user to fast mount or dismount a cymbal.

Abstract: An electronic device is provided. The electronic device comprises a display unit and a processing unit. The processing unit is electrically connected to the display unit and is configured to perform steps including: obtaining signal strength of connections between a plurality of nodes; and controlling the display unit to display the connections graphically according to the signal strength. An operation method adapted to an electronic device, and a non-transitory computer readable storage medium is also provided.

Abstract: A musical instrument stand clamp, which to be fixed to a stand, comprises a fixed part, a movable part, and a screwing-lock part. The movable part is pivotally coupled to a pivotal point of the fixed part. The fixed part includes a locked section and a clamping section respectively at two sides of the pivotal point. The movable part includes an outer curved surface near the locked section and a movable member far away from the locked section. The screwing-lock part is screwed through the locked section to push the outer curved surface of the movable part and rotate the movable part with respect to the fixed part so as to move the movable member toward a clamping member of the locked section, whereby the clamp is fixed to the stand. Thus, the clamp can be fast assembled or disassembled merely via rotating the screwing-lock part.

Abstract: A musical instrument pedal with a drumstick angle adjustment structure comprises a drumstick, a rotation shaft, a stand frame, a pedal base, a pedal, and a chain. The drumstick is fixed to the rotation shaft. The stand frame includes a vertical rod pivotally coupled to the rotation shaft. The pedal base includes a fixed member connected with the stand frame to secure the stand frame, a mobile member slidable with respect to the fixed member, and a screw fastening the fixed member to the mobile member. Two ends of the chain are respectively connected with the pedal and the rotation shaft. Thereby, the relative position of the mobile member and the fixed member can be varied to drag the chain to rotate the rotation shaft, change the drumstick angle, vary the force strength of beating the drum skin, and generate different drum sounds for different melodies.

Abstract: A drum counterhoop clamping device, which is to be fixed to a drum counterhoop, comprises a base, a clamping block and a locking member. The base includes a sliding chute and a first clamping plate extending outward and vertically to the sliding chute. The clamping block includes a sliding post slidably installed inside the sliding chute and a second clamping plate extending outward and vertically to the sliding post. The first clamping plate and the second clamping plate are disposed corresponding to each other. The locking member drives the base and the clamping block to approach to each other and enforces the sliding post to pass through the sliding chute to decrease the distance between the first clamping plate and the second clamping plate. Thereby, the present invention uses the plane-like first clamping plate and second clamping plate to increase stability and strength of clamping the drum counterhoop.

Abstract: A musical instrument stand clamp, which to be fixed to a stand, comprises a fixed part, a movable part, and a screwing-lock part. The movable part is pivotally coupled to a pivotal point of the fixed part. The fixed part includes a locked section and a clamping section respectively at two sides of the pivotal point. The movable part includes an outer curved surface near the locked section and a movable member far away from the locked section. The screwing-lock part is screwed through the locked section to push the outer curved surface of the movable part and rotate the movable part with respect to the fixed part so as to move the movable member toward a clamping member of the locked section, whereby the clamp is fixed to the stand. Thus, the clamp can be fast assembled or disassembled merely via rotating the screwing-lock part.

Abstract: The present invention relates to a bidirectional voice transmission system and a method thereof, wherein the system timing of the system is divided into three time slots for carrying a control signal, a broadcast voice signal and a mobile device voice signal. The bidirectional voice transmission system is able to carry out the signal transmission by way of frequency frogging, so as to effectively avoid the signal interference from occurring between any two different signal transmitting and receiving devices. Besides, all of the mobile devices can be added into the bidirectional voice transmission system by way of dynamic building, without using any specific communication interface. The most important is that, the number of node routers can be expanded to about 65,000 in order to apply the bidirectional voice transmission system in a huge range network communication or a wild rescue field.